Improvement in prlmirs for cartridges



A. C. HBBS.y

Primers for Cartridges.

No.l48,366. Paienredmayc-hlmlsm.

UNITED STATES- PATEN'F OFFICE.

ALFRED C. HOBBS, OF BRIDGEPOBT, CONNECTICUT.

IMPROVEMENT IN PRINIES FOR CARTRIDGES.

Specification forming part of Letters Patent No. 148,366, dated March10, 1874; application filed December 26, 1873.

To all whom it may concern:

Be it known that I, ALFRED CHARLES IIOBBs, of Bridgeport, in the countyof Fairfield and State of Connecticut, have invented a new and usefulImprovement in Primers for Cartridges; and I do hereby declare that thefollowing is a full, clear7 and exact description thereof, referencebeing had to the accompanying drawing making part of this specification,in which- Figure 1 represents a central longitudinal section of a casefor a cartridge having one of my primers applied thereto. Fig. 2 is aeentral longitudinal section of a primer detached from thecartridge-case. Fig. 3 represents an end view of Fig. 2. Fig. 4illustrates a central longitudinal section of a primer having a lessernumber of sides than Fig. 2, by which one corner thereof is presented tothe fulminating-powder, instead of one of the hat edges. Fig. 5 is anend view of Fig. 4.

Like letters designate corresponding parts in all of the figures.

My invention consists in a primer for cartridges, the case of which isof the usual cylindrical form, and having a many-sided anvil, upon whichto explode the fulminating-powder-that is to say, an anvil having anyeven number of sides of equal or corresponding lengths, the object ofwhich is, first, that in the manufacture this anvil may be inserted intoits case automatically; second, that when inserted it will maintain therequired position longitudinally with the case; third, that this anvilis retained in position within its case by the friction of its paralleledges against the inner surface of the case.

The case A of the cartridge is of the usual form known as a center-fire,the rear or closed end of which has the pocket or recess B, to receiveand hold the primer, and is represented merely the better to illustratemy new primer and its adaptation thereto. The case C of my primer is ofthe ordinary cup form in general use in such primers, and the commonpercussion-cap may be employed in which to insert the many-sided anvil,and which, when so provided with my new anvil, makes an excellent primerfor a center-lire cartridge. This anvil D is many-sided, and each sidebeing of equal length, or so nearly equal as to be automatically fedinto the case in the manufacture thereof, the number of sides being suchthat in whatever position this anvil is presented to its case C, two ofits edges will always be parallel with two opposite sides of the innersurface of its case; hence this anvil cannot turn crosswise in the case,and must take, and remain in, a perpendicular position to the fulminateo, asshown in the drawings.

By making the anvil D hexagonal, a point or corner, o, thereof ispresented to the fulminate, as in Fig. 4; but the octagonal form,

Figs. 1 and 2, is preferred, by which one of,

the flat edges, instead of a corner, is presented to the fulminate o, inwhich case a larger area of surface is offered to the hammer orfiringpin of the gun, and avoids the probability of the fulminatebreaking or crumbling in pieces under a -blow to explode it, which it isliable to do where only a point or corner of the anvil is presented,upon which the fulminate must be crushed to explode.

The third and one of the important points of advantage in a primer theanvil of which is many and equal sided, as represented in the annexeddrawings, is, that by presenting its llat edges to the inner surface ofthe cylindrical case C longitudinally, the said anvil remains inposition without further provisions to secure it, thus dispensing withany disturbance of the case C for that purpose, as in the patent ofHobbs and Orcutt, dated October 24, 1871, and numbered 120,196, in whicha disk or round anvil is employed, necessitating special provision formaintaining it edgewise against the fulminating-powder.

By the use of my many-sided anvil in a primer for cartridges, one of itsflat edges or a corner thereof must, of necessity, be presented, and soremain, crosswise or centrally to the fulminating-powder, as hereinrepresented, thus reducing the danger of failure to explode to defectivefulmin ate only.

Having thus fully described my improved primer for cartridges, what Iclaim therein as new, and desire to secure by Letters Patent, is

In a primer for cartridges, an anvil standing edgewise therein, havingan equal number of sides, adapted for self-adjustment, substantially asherein described.

A. C. HCBBS.

Witnesses:

H. C. MALLEFT, A. J. Horns.

